I had similar issues using the standard inlet manifold with bigger injectors. Instead of the larger turbo making more power it did less (went from TD06 at 440bhp to GTX3071 at 400bhp). I ended up with the Greddy Shortport plenum, same injectors pump etc. Also added adjustable pulleys and it gained 100bhp That was using a Fuel Performance pump with better flow than a walbro though. I've since ran in a new fuel supply line and fitted a Bosch 044 in a tank which has dropped the injector duty down out of the high 90's.

That wastegate outlet on the manifold does look a bit shit if I'm honest. I'm still using my copy of the TD06 manifold, with the smallest Tial wastegate, 38mm I think, never have any creep issues. Hopefully you can just chisel off the coating around where you need to change the manifold?

I had similar issues using the standard inlet manifold with bigger injectors. Instead of the larger turbo making more power it did less (went from TD06 at 440bhp to GTX3071 at 400bhp). I ended up with the Greddy Shortport plenum, same injectors pump etc. Also added adjustable pulleys and it gained 100bhp That was using a Fuel Performance pump with better flow than a walbro though. I've since ran in a new fuel supply line and fitted a Bosch 044 in a tank which has dropped the injector duty down out of the high 90's.

That wastegate outlet on the manifold does look a bit shit if I'm honest. I'm still using my copy of the TD06 manifold, with the smallest Tial wastegate, 38mm I think, never have any creep issues. Hopefully you can just chisel off the coating around where you need to change the manifold?

Il get all the new bits on and see what's what then Il have to look at redesigning the wastegate port, never ending isn't it.

Then it was mapping time. Gary at apt was the man of choice again and he did I very nice job. No issues with creep this time, I'm starting to think maybe I had a boost leak or something. But anyway, everything went to plan and final.results where 502bhp and 450ftlb

Sorry to see this, what happened? Did you have to modify the exhaust manifold in the end and what size gate you opt for?

It ate number 3 rod bearing in a big way had to have all crank reground, block line bored, and rod resized. Back together now. Stuck with the Mani and the 44mm wastegate. Boost settled at 1.5b so that's low boost setting. Didn't see point in going into loads more work and money to reduce boost. Who wants to pay for less power

It ate number 3 rod bearing in a big way had to have all crank reground, block line bored, and rod resized. Back together now. Stuck with the Mani and the 44mm wastegate. Boost settled at 1.5b so that's low boost setting. Didn't see point in going into loads more work and money to reduce boost. Who wants to pay for less power

Sent from my ONEPLUS A5010 using Tapatalk

Ooph! Could’ve been worse I suppose. What WG spring you running? If you’re happy at 1.5 then that’s cool. Guessing the mani won’t let you see any less which was the issue I had. That and it crept up to 1.7+ bar on cold mornings. I wanted 1 bar low and 1.4 high so... I’m fussy? Hopefully bump into you this year or next on track. Be good to see another s-body in attack mode.

Ooph! Couldíve been worse I suppose. What WG spring you running? If youíre happy at 1.5 then thatís cool. Guessing the mani wonít let you see any less which was the issue I had. That and it crept up to 1.7+ bar on cold mornings. I wanted 1 bar low and 1.4 high so... Iím fussy? Hopefully bump into you this year or next on track. Be good to see another s-body in attack mode.

Yeah Def have a meet up at a track. And 1.5 suited me for low boost really. My high is 1.8 so it worked out fine. And it's a 1bar spring.